Detcon 700 HRT Bridge - Manual (Page 9)

HRT Bridge
700 Sensor HRT Bridge IM Rev. 0.2 Page 5 of 18
Primary Variables
• Concentration – the value of the gas concentration measured by the sensor. The units of measurement
(ppm, ppb, or %) are shown to the right of the concentration value. This is the HART primary
variable.
• Loop Current – the value of the output 4-20mA loop current
• PV %rnge – Primary variable percent of range
• EngUnits – the measurement units and gas type
Range Variables
• PV LRV – Primary variable lower range value (normally 0 for most sensors)
• PV URV – Primary variable upper range value, or the range of the sensor (i.e. 100ppm, 10ppm, 5%,
etc.)
Device Status
• Indicates the device has more status information available. If this icon is green, no additional status
information is available. If it is red, refer to Section 4.2 Diagnostics for more information.
Measured Values
• Concentration – the value of the gas concentration measured by the sensor. The units of measurement
(ppm, ppb, or %) are shown to the right of the concentration value
• Temperature – displayed in degrees Centigrade.
• PS Voltage – power supply voltage. Nominally 24VDC
PV – Graphic display
A graphic display of the sensor concentration reading may also be displayed in this screen. The graph will be a
graphic display of concentration verses time.
4.1.2 Identification
The Identification screen contains 4 sections that provide some basic HART information as well as some
additional sensor information. None of these variables are able to be changed in this screen, although some of
these variables may be changed elsewhere.